MIAMI, FL, USA
N7699S
BELLANCA 8KCAB
WHILE ON A PERSONAL FLT DURING NORMAL CRUISE, THE PLT REPORTED THAT THE COCKPIT FILLED WITH SMOKE. HE TURNED OFF THE ELECTRICAL SYSTEM & SECURED THE ENG, THEN ATTEMPTED A PRECAUTIONARY LANDING ON A GRASS STRIP. THE ACFT LANDED LONG, OVERRAN THE RWY, & NOSED OVER. EXAMINATION OF THE ACFT REVEALED THE MUFFLER SHROUD HAD A CRACK WHICH ALLOWED THE AIR NORMALLY USED FOR CABIN HEAT TO CONTACT THE FIREWALL. AS A RESULT, THE INSULATION OF THE INSIDE OF THE CABIN OVERHEATED, PRODUCING SMOKE.
Source: NTSB Aviation Accident Database
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